import {makeMap} from '@/utils/index';

// 参考https://github.com/vuejs/vue/blob/v2.6.10/src/platforms/web/server/util.js
const isAttr = makeMap(
	'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,'
  + 'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,'
  + 'checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv,'
  + 'name,contenteditable,contextmenu,controls,coords,data,datetime,default,'
  + 'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for,'
  + 'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,'
  + 'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,'
  + 'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,'
  + 'muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster,'
  + 'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,'
  + 'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,'
  + 'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,'
  + 'target,title,type,usemap,value,width,wrap',
);

function vModel(self, dataObject, defaultValue) {
	dataObject.props.value = defaultValue;

	dataObject.on.input = val => {
		self.$emit('input', val);
	};
}

const componentChild = {
	'el-button': {
		default(h, conf, key) {
			return conf[key];
		},
	},
	'el-input': {
		prepend(h, conf, key) {
			return <template slot='prepend'>{conf[key]}</template>;
		},
		append(h, conf, key) {
			return <template slot='append'>{conf[key]}</template>;
		},
	},
	'el-select': {
		options(h, conf, key) {
			const list = [];
			conf.options.forEach(item => {
				list.push(<el-option label={item.label} value={item.value} disabled={item.disabled}></el-option>);
			});
			return list;
		},
	},
	'el-radio-group': {
		options(h, conf, key) {
			const list = [];
			conf.options.forEach(item => {
				if (conf.optionType === 'button') {
					list.push(<el-radio-button label={item.value}>{item.label}</el-radio-button>);
				} else {
					list.push(<el-radio label={item.value} border={conf.border}>{item.label}</el-radio>);
				}
			});
			return list;
		},
	},
	'el-checkbox-group': {
		options(h, conf, key) {
			const list = [];
			conf.options.forEach(item => {
				if (conf.optionType === 'button') {
					list.push(<el-checkbox-button label={item.value}>{item.label}</el-checkbox-button>);
				} else {
					list.push(<el-checkbox label={item.value} border={conf.border}>{item.label}</el-checkbox>);
				}
			});
			return list;
		},
	},
	'el-upload': {
		'list-type'(h, conf, key) {
			const list = [];
			if (conf['list-type'] === 'picture-card') {
				list.push(<i class='plus'></i>);
			} else {
				list.push(<el-button size='small' type='primary' icon='upload'>{conf.buttonText}</el-button>);
			}

			if (conf.showTip) {
				list.push(<div slot='tip' class='el-upload__tip'>只能上传不超过 {conf.fileSize}{conf.sizeUnit} 的{conf.accept}文件</div>);
			}

			return list;
		},
	},
};

export default {
	render(h) {
		const dataObject = {
			attrs: {},
			props: {},
			on: {},
			style: {},
		};
		const confClone = JSON.parse(JSON.stringify(this.conf));
		const children = [];

		const childObjs = componentChild[confClone.tag];
		if (childObjs) {
			Object.keys(childObjs).forEach(key => {
				const childFunc = childObjs[key];
				if (confClone[key]) {
					children.push(childFunc(h, confClone, key));
				}
			});
		}

		Object.keys(confClone).forEach(key => {
			const val = confClone[key];
			if (key === 'vModel') {
				vModel(this, dataObject, confClone.defaultValue);
			} else if (dataObject[key]) {
				dataObject[key] = val;
			} else if (!isAttr(key)) {
				dataObject.props[key] = val;
			} else {
				dataObject.attrs[key] = val;
			}
		});
		return h(this.conf.tag, dataObject, children);
	},
	props: ['conf'],
};
